Incubator.



W. H. HOWARD.

INGUBATOR.

APPLIGTION FLED JULY10,1908.

Patented Feb. 7, 'i911 3 SHEETS-SHEET l,

W. H.. HOWARD.

INCUBATOR.

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INGUBATOR. APPLICATION FILED JULY10,1Qoa.

Patented Feb.

State of WILLIAM H. Bewaren," or cororAXI,

ioniriiD,l STATES .PATENT onirica.l

COLORADO, ASSIGNOR 0F lONiE-BIAILF T0 J'. BAYMOND HOWARR. CG'IOPAXI, COLORADO.

To 1.72 whom 'it may concern:

Be it known that- I, WILLIAM H. HOWARD, a citizen f'the United States, residing at L (,"Otopaai, in thc count;r of Fremont and .olorado, have invented new and useful Improvements in Incubators, of which the following is a specification. i A

T his invention relatesA to' incubator-s, and the objects of the same are to provide' means for regularly and uniformly heating the egg chamber and maintaining a degree of heat most beneficial during the entiijeperiod of incubation; to automatically ventilate the iinaibatorb-i' ineans under control of the heat regulating means di thermostat mechanism; and to produce a superior incubator structure having a generally ei'hcientauto- .matic operation and one `not requiring special attention, so that whether an operator is i0 skilled in the art of incubation or not, the

I machine' will continue to 'practically operate without liability of injuringfthe eggs.

The improved machine embodies numerousconvenie'nt attachments for aiding the operator in ascertaining the condition of the egg chamber and eggs when desired; for re- 1 plenish'ing' and controlling the' heating niedium and heat generating means, and for irtsuring a maximum hatch from a viven numbci` of eggs and in accordance with the capacity ofthe machine The invention consists in the construction and arrangement of the several parts which will be more fully hereinafter specified.

ln the drawings: Figure l is a longitudinal vertical section of an incubator' embodying-the features of the invention. Fig. 2 is a front elevation of the same, partial-ly broken away and -shownin section. tFig. 3 is a transverse vertical section on the vline 3-3, `F ig. 2. Fig. 4 'is a detail perspective View show- Specification of Letters Patent. application sied Juiy 1o,

h tes an'inclosi-ngv casing aviiig aidoubleftopcomposed o bei-.withcancmieposedlining `3 incUBA'roB.

isos. serial No. 442355.

be preferably' employed in constructing all parts of the 1ncubatoi-'-e`xcept the devices which will be hereinafter specified.

Disposed within the inclosing casing l -is mental casing 5 having a bottom, ends, sides and top tightly joined, and within the outer -\val1 or supplemental casing are the incubating chambers proper', there being two of the latter shown. in the presentl instance formed by a central partition 6, but it will beundertures of .the invention may' be equipped with only one of these chambers or morethan two with the capacity ofthe machine. 4The inbottom 7 and closed ends and sides 8 and 9. The sides, ends and bottom ofthe incubating `members of the inc-losing wall or 'supplel after specified. Similarly vthe top, sides,

what may be termed an incubating inclosurevr which comprises-an outer wall or suppley chambers are spaced from the corresponding PatentedFeb. 7, 19.11.

stood' that' an incubator embodying the}fea-.

701"- and which will be regulated in accordance cubating chambers as shoy'n have aV closed v i mental Cillg. 5' to 'provide dead-air spacemeans l0 for a purpose which will he hereing ends and bottoni of the wall or supplemental casing 5 are spac d from the corresponding members of'the inclosing casing 1, or, inl other words. the supplemental casing 5 and incubating chambers therein are of such dimensions with respect to each other and to the incl'osing casing. l that passages rwill be provided. betwen the ii walls th'gieo'f as explained, and by this means the incubating `chambers will be fully shieldedand protected from detrimental eftterior` atmospheric influences and-also be more regularly '-lieated without requiring as much uell as Each?V incubator chamber 11 will be ferr-ed form,- these trays being removable through the-medium of doors 13 in the front y of the machine, as shown by Fig. 2, the doors being preferably of the downwardly opening type andhaving any suitable'features' of construction, that will render the same tighttting in the ope s with whiehtheycooperate. The egg trays 12 are held at a suitv.ableelevation abo-ve reinovablechick trays 125 lthefsaid trays .12* serving asia 'rest or su ort for theihatclied chicks. Y-

ithin the egg chambers 11-are thermostats 14, each having 'an expanding member p or elenieiitl projecting'iipwardly throughv equipped with an egg tray 12 of any pre-- sov consumed in the ordinary forni of incubator.

i'oo

chamber-20 andthe double top of the outer the-te of the machine.- Each chamber provi ed with a thermostat and the latter may be of any ap roved'. form of construe# tion adapted for t el purpose; and the exs-` panding member in each instance is con-` nected at its upper extremity by 'an adjusting screwvor analogous device'A 16V4 to a con- Y trolling lever 17 intermediately fulcrumedas at 18 and havinvits inner extremity provided with a weight or counter-` loise 19 t'o insure a sensitive operation o the lever '",f- 4when released'or free to movetdownward at f". vits inner extremity and 'close certain devices which will bcmore fully hereinafter explained. l' i Between .the top lof-.the inner wall or supplemental'casing .5 and the double top of closed by flap valves 22 hingedat one ex vtremity and free'to move at'the opposite the outer inclosing-casin'g l, a heating chamber is formed and extends the full length f the incubator; and also'transvcrsely of the latter, and also .downwardly back of the said casing 5. Ventilating opcnings`21 extend vertically through the double top of the outer'. inclosing .easing ll and communicate with the heating chamberd20, the upper outlets vof the said openings vbeing normally extremity and having'a chain or analogous exible device 23 connected .to the intermediate` portion' of each and 'to the extremity l `ofthelever l'iabove, The openings 21 are providedwith tubular' linings 24, as clearly shown byk Fig. 2, and the valves 22 coperate,

-directly `'with the upper ends of the said lin` ings. 'iVen'tilating 'tubes 25' also extend 4 through-the top po'rtihnl of the wall or sup-l 'pler'nental casingf' and communicate with .incubatingchambers` .11, the Asaid tubes 25 continuingfupwardly` through the heating inclosing casing 1v." The tubes 25 are of vvgreaterdiameter'. than the tubes M and have flap valves 2G -coperating wit-l1 their upper outlet-:extremities and intermediately conne'eted by flexible "means 2'7 to the levers 17 above thesame.,4 The heating chamber 20 is lcontinued.downwardly atthe o posite ends of the'macliine'as at 28, and in tie end walls of thouter -inclosing casing -1 are ventilating*` opening." .29 :disposednear thehottom Extending lalongr the rear 'upper portions ofl the, incubating chambers 1-1 within the back portionof the heating chamber 20 is a Ventilating y pipe 11" having branches 1lb communicating 'at vintervals with the' cham! bers 11, the said pipefllalso having end legs 111e depending to near the bottom of Athe outer casing at the-end portions of ther latter,

as shown by-Fig".l 2l' .The legs 11 areprovided A with foutwardlyA extending branches 1ld -projecting through the openings 29, and

by this means the chambers 11 may be ventilatefh Ventilating leg 11c has a vertically movable-slide valve 3l.) coperating".4

therewith andoperatively confined therein,

a Hexible connecting' device "or Wire 31 be ing attached to the upper end of each valve and movably extending-through openings 32 Aand .32.respect'ively in the upper terminal of the leg 11. andthe double'top of theouter inclosingY casing 1 andv attached to an` outer hooked member '33 forming part of theouter extremity o f the lever 17, theventilatf' ing pipes 11 having the branches 11b communicating with. the chambers 11 `and the legs 11c provided-with means for controllingl communication thereof with the atmospheric exterior of the incubator will operate not only to relieve the chambers 11 Oiga-ses arid degree for which the thermostat may be set,

the thermostat member 15 elongates, aS will he understood, and raises the inne-1' extremityof the lever 17 and consequently lowers the outer 4extremity of said lever, thereby opening the valves 22 and 26 by raising said p valves and 'lowering the valve 30 to clear the Ventilating branches 11d. A Vhen either of the thermostat members 15 elongates through'l excessive heat in the corresponding chamber l1, the.- inner extremity of the lever 17 to which said member is attached will be elevated and the outer extremity ofthe sa'id lever. will be lowered as particularly shown by Fig. 2 and the valve 30 attached to th`- .lever 1T so operated and mounted in theone leg l1c will be lowered-and the air from the exterior of the incubator' admittd-to the interior of the egg chamber 11, the upper bett-` "elecl or inclined end of the valve 30 permit-v ting a gradual ingress or escape of the air through 'the leg 11 or branch of the leg 11. 'hen the chamber 11 1s working under nor maleonditions and the thermostat niember 15 y contracted, the valve 30will be elevated reason of thc fact that the inner extremity of the lever 17 will he lowered 'through 1the weight 1S) and the outer extremity of said lever elevated and pull-the valve 30- upwardly to gradually close the branch 11d by "reason of the upper inclined extremity 3 of the said valve. TheV upper inclined extremity of the valvealso prevents a teo rapid infiux of the air into the chamber 11 and eillux of the gases or foul airffrom the j said chamber. The tubes'24 and 25 being thus opened will permit the heat" currents -to pass out from-the heating chamber. 20 and each incubating chamber 11 respectively,

and the einfeeding of cold air from the'ex-p terior through branches .l1d legs llf-, pipe 11 and branches 11b will properly. temper 5 an independent operation as to their comg lfilmated aii andfoul gases escaping through '55 and 41" o r lower the degree of heat ofthe incubating chambers. The VSame operation will take place in both incubating chambers, but it will be understoodthat the A,chambers have bined .t controlling and Ventilating mechanism, and .bythis means if one incubating chamber becomes more rapidly heatedA thanvthe other and reaches an excessive de- U'gree of heat, its heat controlling and ventiat' g aectingthe similar mechanism of the other incubating chamber and 'which may be at the time invnormal condition. 'lhe .valves 3() 5 'are beveled at' their upper extremities as at so-a's to4 partially or wholly open and close the inlets or branches 11d. l

Extending longitudinally 'over the top of the machine and inclosing the levers 17 and 0 the `parts with which said levers coperat'e, is asuitablesheet metal hood 34 fully open at its opposite extremities and also provided with top openings 35 covered by slides-36 for gaining accessto the adjusting screws or analogousdevices 16 of the thermostats. The'advantage of this hood is that the thermostats aswell as the levers and the flap valves are shielded and thus less liable to become broken, and,. `further, the hot air passing outfthrough thev tubes 24 and the the tubes 25 ,will be j towllld f machine andliberated in the surrounding tatmospherefyvith less obstruction than would more readily conducted yl ensue if theends of thetubes 24 and 25 were fullyexposed to-the. atmosphere in view of A th'ofact thatthere is always more or less v"draft-th rough the hoodwhich willaltect. 4 4,. .Valveso'pentosuch draft;

v *Sight openinvs 37 areformed in the topv "'fltheonterin'c osure and-,continue through cheating-chamber 2O and the to", portions .byremovable plugs 40.

lgiftheincubati'ng chambers 1lv lsai 4.openinefs f'being providedwitl lining tubes 38 hai"- glass or other transparent members 39 .therein and closed at their outer extremities The doors l3- also havefsimilar sight. openings 41' extending 5 0 therethrough and through the adjacent side 'into the incubating chamber at a downward .angleof inclinationand also provided with glass or other transparent members 42 4and outer plugs 43. The openings 3.71

vide means for inspecting the :inthe incubatingA chambers and viewterior l y ,on-the trays `12, Vone -ope the . gs A assstingete other when'the plugs 40 arid'43` are removed in illuminating'the incubat asa sightfopening to-permit an operator to lrfloolt inwardly intolthe-incubat-ing chambers.

mechanism is free to operate without opposite extremities or ends of thev chambers, and eithei-opening may be als-Told;

I spectionof the thermometers that may be placed on the egg trays. These sight openi ings further permit inspection of the interior ofthe incubatingchambers Without opening thedoors 1 3, and as said openings i have transparent members disposed therein and closely fitting the same the atmosphere. 5 surroundingthe incubator will be prevented when the plugs and 43 are removed.

.The heat generatingmeans and heatlng medium, together. with the coperating acprovided with a lower horizontal member 53. Surrounding the burner 49 of the lamp is an annular water chamber 54 having upper and lower pipes and 56 connnunicat- -ing therewith and extending oit in horizontal planes and communicating with the ably arranged ,lon the membe" ot thc lbracket L52.' `Thelower pipe 55 terminates in line with the bottom of the water tank 57, but the pipe 'continues into anangularly disposed or' vertical outlet extremity 5S which is of greater diameter than tljcdi ameter of the said pipe 56 and has its outlet water tank. The objectof the Water chan ber 54 is tocool the lamp adjacent to the point'o'f greatest vheat to avoid explosions,

ough circulation of water in thesaidcham- From time to time the water tank 57 may =be replenished or resupplied with a quantityof .cold waterlt'o maintain the water Athe lamp adjacent to the burner.

To remove the lamp, the o rator must hold the same with one'han'd swing the bracket 46 by the knob or projection47 out then lower the lamp. A- reverse is ursued in applying the lamp.

entrally disposedin the bottom of the' incubator .isa water heater thereinto. and ful-ly openi .receive the lam-p chimney [and permit from rushing into the incubating chambers below the bottom of the incubator;l and islower `extremity of a water tank 57 remov-' 59 vwhich.1 is partially annular :and'has .a1 'heating chamber 60 extending 'upwandly at the/bottom4 to cessories, will now be described. To the bot'- tom of the incubator and depending below extremity located adjacent to the top of thev and the two pipes 55 and 56 set up athor-4 circulating through the pipes 55 and 56 at a proper temperature for effectively cooling .1

of position, turn the-lamp sutiiciently'to re- 'i move the reservoir 57 from the rest 53', and operation lthe lower portion'l" of the incubator below-'the incubating cham-) bers 11 and.:A extending f lowmvax-'dly below l metal collar or c ond orinelosing heated currents to 'circulate therein. They heating chamber 60 is formed by an elongated thimble 61 centrally secured in and forming part of the, inclosingwall'of the water heater 59, the Wall Vof the water heater being fully closed at, all other oints except at the bottom where'a-vvalved rain pipe 62 issecured, Depending from the bottom of the incu-l bator. and eoncentrically arranged with relation Vtothe water heater 59 isa thinl sheet linder 63 which overlaps or projects below t e upper extremity of a seccylinder 64 for the lower extremity of the heater l59, the lower extrenritybf the cylinder 64 and upper extremity f the cylinder 64 being connected at intervals by wooden or other analogous blocks 65 interposed therebetween and spaced a'sufiicient distance to permit heat 'currents to pass down around the'lower end of the h eater 5 9 and upwardly and out through the cylinders 63 and 64 to facilitate combustion. The .u per end-of theI linder 64 is .fully open, ut the low'eiid 6 is inwardly bent o r flanged to .meet a plate 66* held by the lamp, said plate being apertured at intervals and es ecially to ermit the drain pipe 62 to pass t erethroug and to take over the the water heater 59 including the water a' radiator 69-having an upper elongated Y accumulations of burner, 49 of the la'mpLThe plate 66;*"has a greater diametrical extent than the bottom of the chamber 60, so that when the lamp is removed-thebottom of the said chamber will be cleafr to permit the operator to clean out the chamberGO and relieve thevlatter of products vif combustion that may have settled therein. On the upper closedend 67: of the water'heater 59 a heat non-conducting disk 68, of suitable material, preferably wood,,iS laced and has its -up, per side iii-close relation to' the con mon bottom 7 of the'ineubatingchambe j 11, the ob]`ect of this heat non-conducting disk or elementbeing to rcvent a concentration `-of, too great heat at t ie ortions of the incubating chambers imm iate'ly above the said disk. f

The 4circulatory s stem of the incubatorl heater 59 also comprises rectangular or similarly-shaped top member 70 which is horizontally disposedand depending end legs t71 continuous with or secured to return pipes 72 having downwardly-and inwardlygnclined extremities 73 -the lowerI portion i of at. diametri site points. To the top portion heater 59 a plurality of feed-pipes 74, l5, 76 and 77 connects and extents outwardly in various directions through different por` communicating wit tions of the incubator around the incubating chambers-and through the space 10 and connects with the upper horizontal member 70.l of the radiator69. The rseveral pipes 74,

fadJacent to .one

posed between the T84 and the coperating lever 17, so that as the latter 'moves the counter-lever mechanism,

75, 76 and 77 are so shaped to fully eiu- I bra'ce'the incubating chambers and each pipe des upper and lower horiof this series inclu zontal members connected bya vertical member, The upper-and lower members of these feedpipes are so curved as to bring their vertical as clearly illustrated by Fig. 4I

ivo

connecting members in different positions.

lr'elati\ fely to the longitudinal extentof the- .combined incubating 'chambers so as to unidistribute the heat between the walls,

formly of the chambers and the supplemental casing n' 5. The radiator member the heating chamber 20 at the center'of the latter, as c learly'shown by Fig. 3, and the legs 7lqdepend through the center of tlhe p the outer inclosing casing 1, and by this means the return pipes 72 lower temperature back to :he water heater l0 is disposed in 59 than-the waterjmssng outthrough'\th`e. 'feed-pipes connected to the upper extremity heater are-separated from the of said water said feed-pipes by thecnd and bottom walls of the supplemental casing 5 and ,thereby counteractingcool'iiig influence of the water returning through'the pipes is prevented andl upwardly through the feed-pipes, A

The water heating and circulating system conveying water atra\5 I v rom affecting the heated water passingout is supplied with water at intervals as may be found necessary through the medium A0f an inlet tube 78 extending through the. top

of the inclosing casing 1 and communicatingwith one extremity of the member 70 end of the incubator, the upioo per end of the inlet tube being' l'provided 1 with a'funnel 79 in which the circulatory system is also tempered or is itted re? movable stopper or plug 80. The ,water inv reduced toV a certain degree .or extent by the thermostat mechanism hereinbefore described and-controlling the ventilation of the incubatingcliambers l1,the heating chainber.20 and the spaces aroundithldsupplemental inclos'ing casing 5.

Between tthetubes 74 and 'fofri'sfi-r: tube 81 extending through .the double top-ofthe outer inclosing easing l and commuiiicat-- ingwith the to portion of the radiator 69. This tube 81 as a valve 82coperatin therewith to open and close the upper en of the same, counter-levers 83, see Fig.A 3, engaged by actuating levers 84 having their outer extremithe said valve vbeing operatedl by .l

into `the hood 34in planes at fright angles to one of the levers 17, vertically disposedoperating projections 85 being inter# A ,outer ends 'of the lever embodying tha-levers 83 and 84 lwill correspondingly actuate the valve 82 and "opeii'v thetempera'turc of the watet inA thct l1-L diator 6 9 will be lowered by. allowing'the from .th radiating chamber Vandthe incubatmg Achambers 11 and 'the ventilation' oil the interior of the-incubator through the medium of the o enings,'pipes and bra'nches'l heretofore explained and valves 30, and thus it will be seen that the thermostats and co-- operating levers '17 control. noonly the' del'the temperature of the grec of heat of the incubator 'or maintain latter at a proper degree, but .that simultaneously the incubator is 'ventilated and the Vheatin 4medium is correspondingly tempered or re uced. This unilication as to control of the teniperature` and ventilation of the vincubator proportionate to the degree .of heat which 'the thermostat's have been set. to maintain is advantageous not only in dispensing with mechanism requiring an independent operation and adjust-ment, but in preserving uniformity of temperature throughout the exitire incubator in an automatic manner and mistakes incident to ignorance on the part of an ope'ratoras to the necessary adjustnient, of separa te parts or in View of lack of f attention, will be avoided; and it is"p0ssi'. ble to place the incuhatoreither indoors" or fully expose the same outdoors without se--` rious consequences orinterier'euce with the pro )er operation of the -several incubator mec anisms. The llame offrt e lamp .may

also be regulatedat will 'an it-is` fully shielded from Athe surrounding atmosphere and is therefore not subject to drafts and -u'ill remain continually ignited as loiigas required and when the oil suliicient t0 maintaiucombustion. .The valves coperating with the several outlets or vents, as explained, willbe set to obtain the best resultsand will open and close in accordance "with their position or attachment with rechamber reaches 106, all thev foregoing spect to the several levers or lever mechamsm.

Athrough the ventilating pipes hereinbefore explained' when -the temperature in said chambers has reached 100; vent will open when chambers 'reach 104% vent 21` will open when eggr chamber reaches 105",- and 81 will* open whenitcmperaturc in egg vents elosingprcversely .as the temperature lowers.` The positionszof the valves, 'hows ever, may'be modified in various ineuba.- tors and in proportion to the lengths of the levers. It will be understood that the eggs will be properly disposed upon. the trays 12 and remain in the incubator during the period of incubation, or until they are hatched,

It is intended that the valves 30 shall open to ventilate the egg chambers `vals` an the circu atiy 'system likewise. re- Plems'hed with water;-

chambers'the-doors 13 are closed and re- 'fthirty'f -si'a .hours, and di'trin this latter time the incubatoris heatedianf4 .regulated as to heat required,'102 F byl'turnmg the lamp "wick u Or'dtnvn1a's .necessary and determlned byjinspe'ctin' the thermometers placed inthe egg hamer. After the incubator is A.properly heated, theV doors are until the third day, At Athis time and contnuo usly and; regularly until the eighteenth day offincubation the eggs are turned twice or' more "every twenty-four hours by -openingthe doors-and gent-ly rubbing the hand over them.- ,At the end .of the` eighteenthday'the doors arep'elo'sed and remain inI *,thiscondition until fi-the chicks are beobserved .".throughthe 'transparently protected front' chilling drafts by having thefuppe'r portions'of the egg chambers.

Q It will be"ui iders'tood that the ventilation "of the egg"chaiubers .is 'regulated in accordlance with th'j temperature of.v the said egg chambers'and 'notiby the temperature or degree' of heat ofthe` water reservoir and 'circulatory'system'. 'j'lThe provision of the water circulating system andthe particu lailmeans lforventilating 'are conducive to .and ,insure a iui-nimized consumption of fuel uniformity and regularity of temperature throughout fall A:parte of the incubator. While 'tufo egg; chambers are shown, it will be undest'qod itedtovthis number;l

The legs 71,01 the radiator 69 provide rcturn means for 'the water fed to the said radiator and converge towardtheir lower extremities where. they communicate with the return-pipes '72, all of the remaining pipes serving as feed pipes for the radiator arid communicating with opposite sides of the latter at points inwardly from the opposite extremities of said radiator, thereby insuring 5a' thorough` circulation of the \\'ater. y A A Having thus-fully described the invention, what is claimed as new, is:

1. 'An incubator having an outer inclasing casing, an incubating-chamber, a heat' source located under the-bottom of the incubator, a. heatinv chamber over the incubat inv chamber, an a water-heatingand cir cu atorysystem consisting of a plurality of pipes extending overV opposite side portions of the incubating chalutier and including an .mainiin this "condition `for twenty-four to opened and th eggs are thfen placed on thev trays 12 and. thesaidjdors again closed 'or heating medium l:for the lamp, and also a wenn being sufphealwah fau at interhatched? The-hatching of the chicks may sealed openingsBTand 41. The eggs are the Ventilating -l'ueans communicating with iat the invention is not limrojectino' legs at theJends' t ereof located ietween t e endwallsof the incubator and having their lower terminals connected to the heating source, the radiator having greater dimensions than thesaid pipes and legs, the pipes being connected to opposite side portions ofthe radiator between' the ends of the latter.'

, 2. An incubator comprising'an outer iiiclosiner casing having Ventilating means at opposite ends thereof provided with automatically operating controlling devices, .an incubating chamber within the casing provided with thermostat means, means for causing the thermostat to control the teinperatuie of the incubating chamber, a 'heating chamber over the incubating chamber, awater circulatory system in the outer Casing and consisting oa plurality ofv pipes surrounding 'different portions of the incubating chamber and an upper radiator centrally disposed in the heating-chamber and from which the'pipes extend, the radi ator having depending legs between the end wallssot the incubator, an upper heat rc'- ducing ineans communicating with the iii-- ierior ot' the incubating chamber, and a source of heat to which portions of the said .pipes and legs are connectechthe thermostat means' 1n the incubating chainber control'- ling both the ventilation and temperature ofthe interior of said chamber and the heat reducing means. if

An incubator having Ventilating and heat reducing means, an incubating chainber with which a portion o" the heat reducing ineans directly ct'iperates, and a water circidatory system surrounding the incubating chamber and providedwith a radiator also haring heat reducing means communieatingwith the interior thereof` the heatreducing means ot' the ("haniber and radiator beingl siniultaneousl)v operable to arrange the-saine in open or closed condition.

et. An incubator haring an outer inclos- Aing casing,4 :in iniier supl'ileineiital casing,

incubating chamber means within the'supplenienta'l casing, the supplemental easing being oi materially less dimensions than the interior of the outer'inclosing casing and .spaced from the latter and the iiicubating chamber means likewise-spaced from the bottom, ends andsidesfof the' slippleinental casing. a radiating chamber bc-' ing` t'ornied over the top portion of the incubating chainberineans, a hot Water circulating System .consisting Aot a water heater located in tlie'lowercentral portion of the '-incubatoiglan uppcrradiator within the radiating chamber having depending-terminal legs inthe space between the end Vwalls of the outer inclosing casing and the end walls 'of the supplemental inclosing casing, return pi pes connected to the lower ends ot the legs and to the low'creXtrcinity of the water heater'aiid passing through thespacey between the bottoms of the -outer inclosmg lcasing and the supplemental inclosing casing, Afeed-pipes connected ,to the. upper ex# treniity of'the 'water heater vand passing .through the space between the bottoms of the incubating means and the supplemental easing and around vthesides and ends of the `incubating chamber ineaiisaiid attached to tiitl'erent'portions of the radiator, an'd means l'or regulating the ten'iperature of the in'v cubator. r Y In an incubator, the-combination of an outer inclosing casing, an incubating chain- 4 bei' inclosed within the said casing, la water heating means located at the central lower portion of the incubator and depending bef sol iiielosing casing'having Ventilating openings at the` ends, vertically movable slide valves cooperating with sait openings, aiigincubatf. ing chamber means within the casing and spaced from the latter, a hot water circulatory system cooperating with and embrac iii-,Lr the incubating chamber nieaiis and haw'-,

ingan upper 4radiator pijpifided 'with 'a A' valved heat eseapeaiid heat reducing openings l'iaringonnnunication .nzithjthe incuhating chamber means and the space -over the-latter, a therniostatin' the incubating chamber meanshaving a member projecting 'upwardlyJ through the incubator, a; lever to which the thermostat member is adjustibljeoi'incctcd. the movable slide valves beingalso attached to said lever,- va1ves'co,

operatingr with lhe outlet extremities of the heat reducing openings communicating with the incid-ating chamber means and the space y abovefftho latter, andv counter-lever mechanisni actuated by the -thermostat levers and coipei'atingl Awith the Valved heat escape 'of `the radiator.

7. Tn an incubator` the combination of anl inclosing' casing haring an incubating chamber therein and-provided with valvd openings to control the ventilation and temperaltui'e-.oi "t.he interior of the casing, the inrubating chamber being also provided with a ,valred outlet,- heating means, a thermostat withinthe incubating chamber, a lever con-I '.'extremities l 8. Lian incubator, the combination of an nec'ted to o` poi'tion of the herrnosiit and the valves of the openingsand outiet, and a hood covering the said openings and valve and lever, the .hood being open .at opposite 'fin'cinsing casing having im incubating charm bei* therein and doors Mathe front fo render sind chamber imcessi'bie,A the topend from of the casing and incubating chamber being 'provided wih openings exending heieings ait'edi'sance' inwardly from 'the enter portions gofhe incloslng casing, the transparent members 1n the inclined openings be ing" disposed at corresponding inclinations 1n planes at right angles io said openings,

and closing devices removably mounted in the @hier extremities of the said openings.

In testimony whereof I have hereunto set my hand in` presence of two subscribing witnesses.

WILLIAM H. HOWARD.

Witnesses:

JAMES R. HOWARD, JornY R. WORTH. 

